CN111425239A - Construction method of ventilation system suitable for super-long highway tunnel - Google Patents
Construction method of ventilation system suitable for super-long highway tunnel Download PDFInfo
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- CN111425239A CN111425239A CN202010301033.5A CN202010301033A CN111425239A CN 111425239 A CN111425239 A CN 111425239A CN 202010301033 A CN202010301033 A CN 202010301033A CN 111425239 A CN111425239 A CN 111425239A
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- 238000010276 construction Methods 0.000 title claims abstract description 72
- 238000009423 ventilation Methods 0.000 title claims abstract description 32
- 238000004891 communication Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 230000008520 organization Effects 0.000 abstract description 2
- 238000005422 blasting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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Abstract
The invention discloses a construction method of a ventilation system suitable for an ultra-long highway tunnel, wherein the ventilation system comprises a first tunnel, a second tunnel and an underground fan room provided with a blower and an exhaust fan, an air supply inclined shaft and an air exhaust inclined shaft which are excavated downwards from the ground are arranged on the outer side of the underground fan room, the air supply inclined shaft and the air exhaust inclined shaft are respectively communicated with two communicating air channels, each communicating air channel is respectively communicated with the first tunnel and the second tunnel for air supply and exhaust, and a transport channel, a first evacuation channel and a second evacuation channel are also arranged between the underground fan room and the second tunnel; during construction, the construction is carried out according to the sequence of the road tunnel, the lower connecting air channel and the upper crossing connecting air channel. The tunnel ventilation device is compact in overall structure, can completely meet the ventilation requirements of normal operation of the tunnel and under special working conditions such as fire disasters, and meanwhile can improve the construction efficiency, shorten the construction period and greatly save the construction investment through reasonable organization construction.
Description
Technical Field
The invention relates to the technical field of tunnel ventilation, in particular to a construction method of a ventilation system suitable for an ultra-long highway tunnel.
Background
From the nineties of the last century, China enters the rapid development period of highway construction, and the extra-long tunnel is straightened by bending, so that the vehicle passing efficiency is greatly improved, and the tunnel has the advantages that other transportation lines are difficult to compare. However, because tunnel building structure is complicated, the environment is airtight, and the section of discharging fume is longer to lead to pollutant concentration in the tunnel to exceed standard, in order to improve inside air quality, generally adopt the ventilation mode of "ventilation shaft formula of sending and arranging + efflux fan" combination at present, it has following advantage: the length of the applicable tunnel under the non-fire working condition is not limited, and the noise is very low; the smoke exhaust efficiency is higher under the condition of fire, and casualties and property loss can be reduced to a greater extent. In general, as the length of the tunnel increases, the number of ventilation shafts needs to increase, for example, one ventilation shaft is usually arranged in a tunnel with a length of 5000-; secondly, the longitudinal slopes of the upstream tunnel and the downstream tunnel of the double-tunnel are usually inconsistent, so that the air quantity is different, the longitudinal slopes of the upstream tunnel and the downstream tunnel are usually not more than 2% and not less than 0.5%, and if the air supply and exhaust structure type of each tunnel is unreasonable, the ventilation efficiency is affected, meanwhile, great risks are brought to the construction, and the construction efficiency and the construction period are seriously affected.
Disclosure of Invention
Aiming at the problems of complex structure and difficult construction of the conventional double-hole ultra-long tunnel with the length of 8000-one 12000m, the invention provides a construction method of a ventilation system suitable for an ultra-long highway tunnel, which can specifically adopt the following technical scheme:
the construction method of the ventilation system suitable for the overlong highway tunnel comprises the following steps that the ventilation system comprises a first tunnel, a second tunnel and an underground fan room arranged close to the outer side of the second tunnel, the underground fan room, the first tunnel and the second tunnel are arranged in the same direction, a first air feeder, a second air exhauster, a first air exhaust fan and a second air feeder are sequentially arranged in the underground fan room from left to right, and an air supply inclined shaft and an air exhaust inclined shaft which are excavated downwards from the ground are arranged on the outer side of the underground fan room; the air supply inclined shaft is communicated with a first air supply communicating air channel and a second air supply communicating air channel through an air supply branch port, the first air supply communicating air channel crosses over a second tunnel upwards after passing through a first air feeder and is communicated with a first air supply port at the top of the first tunnel, and the second air supply communicating air channel is communicated with a second air supply port at the top of the second tunnel through a second air feeder; the air exhaust inclined shaft is communicated with a first air exhaust communicating air duct and a second air exhaust communicating air duct through air exhaust branch openings, the first air exhaust communicating air duct crosses over a second tunnel after passing through a first exhaust fan and is communicated with a first air exhaust opening on the side surface of the first tunnel, and the second air exhaust communicating air duct is communicated with a second air exhaust opening on the side surface of the second tunnel through a second exhaust fan; the first air exhaust connecting air duct and the second air exhaust connecting air duct are positioned between the first air supply connecting air duct and the second air supply connecting air duct, and the second air supply connecting air duct is connected with the second air feeder after crossing the air exhaust inclined shaft; a transport channel, a first evacuation channel and a second evacuation channel are also arranged between the underground fan room and the second tunnel;
the construction method comprises the following steps:
constructing an air supply inclined shaft and a first air supply connection air channel connected with the air supply inclined shaft, wherein the first air supply connection air channel is constructed to the position of a first tunnel intersection after crossing from the upper part of a second tunnel, and after the first tunnel constructed by a full cross-section method passes through the intersection for 20-30 meters, a first air supply opening is constructed outwards from the top of the first tunnel, and then the first air supply opening and the first air supply connection channel are communicated to finish the construction of the first air supply connection channel; then, excavating construction of the left section of the underground fan room is carried out towards the left top by the first air supply connection channel, and a transport channel and a first evacuation channel are sequentially constructed from the underground fan room to the second tunnel;
when the air supply inclined shaft is constructed, the air exhaust inclined shaft and a first air exhaust connecting air channel connected with the air exhaust inclined shaft are constructed, the air exhaust inclined shaft and the first air exhaust connecting air channel reach an intersection of the first air exhaust connecting air channel and the underground fan room, the right top of the air exhaust connecting air channel is lifted rightwards to carry out excavation construction on the right section of the underground fan room, then the first air exhaust connecting air channel is excavated leftwards to connect the right section of the underground fan room and the left section of the underground fan room, and construction of the underground fan room; then, continuously constructing a first exhaust connection air channel, constructing to an intersection with the first tunnel after the first exhaust connection air channel crosses the second tunnel, temporarily stopping, constructing a first exhaust opening of the first tunnel at a set position after the first tunnel passes through the intersection, and then communicating the first exhaust opening with the first exhaust connection channel to finish the construction of the first exhaust connection channel;
after the construction of the underground fan room is finished, a second air exhaust connecting air channel, a second air supply connecting channel and a second evacuation channel are respectively constructed from the underground fan room to the direction of a second tunnel; for the second air exhaust connection air duct, the second air exhaust connection air duct is firstly communicated with a second air exhaust port on the side surface of the second tunnel, and then is constructed towards the direction of an air exhaust inclined shaft by an underground fan room and is communicated with an air exhaust branch port, so that the construction of a second air exhaust connection channel is completed; for the second air supply communication channel, firstly, the second air supply communication channel is communicated with a second air supply outlet at the top of the second tunnel, then, the second air supply communication channel is constructed in the direction of the inclined exhaust shaft by the underground fan room, and when the second air supply communication channel crosses the upper part of the inclined exhaust shaft, the second air supply communication channel extends to the inclined air supply shaft and is communicated with the air supply branch port, so that the construction of the second air supply communication channel is completed; and for the second evacuation channel, the construction of the second evacuation channel is completed after the second evacuation channel is communicated with the second tunnel.
The cross sections of the underground fan room, the first air supply connecting air duct, the second air supply connecting air duct, the first exhaust connecting air duct, the second exhaust connecting air duct, the transport channel and the evacuation channel are all straight-wall arched section structures.
The air supply inclined shaft and the air exhaust inclined shaft are single-hole tunnels, and the cross sections of the air supply inclined shaft and the air exhaust inclined shaft are of structures combining straight walls and semicircular arches.
The first air outlet is vertical to the first tunnel, the second air outlet is vertical to the second tunnel, and the first air outlet and the second air outlet are of a structure combining a straight wall and a semicircular arch.
The first air supply outlet extends 5-25 meters leftwards along the top of the first tunnel, the second air supply outlet extends 5-25 meters rightwards along the top of the second tunnel, and guide plates are arranged at corners of the first air supply outlet and the second air supply outlet.
The transport channel is positioned on the left side of the first air supply communication air channel, the evacuation channel comprises a first evacuation channel and a second evacuation channel, the first evacuation channel is positioned on the left side of the transport channel, and the second evacuation channel is positioned on the right side of the second air supply communication air channel.
The end part of the underground fan room is provided with a duty room and a power distribution grotto.
The construction method of the ventilation system suitable for the ultra-long highway tunnel provided by the invention has the advantages that the tunnel length is 8000-12000m, the maximum longitudinal slope of the tunnel is not more than 2% and not less than 0.5%, a single air supply inclined shaft, a single air exhaust inclined shaft and a matched underground fan room are only required to be arranged on the outer side of one tunnel, each tunnel is communicated with a communication air duct which is arranged on the air supply and exhaust inclined shaft in a branching manner through air supply and exhaust equipment in the underground fan room, the whole structure is compact, the ventilation requirements of the tunnel in normal operation and under special working conditions such as fire disaster and the like can be completely met, meanwhile, the construction efficiency can be improved through reasonable organization construction, the construction period can be shortened, and the construction investment can be greatly saved.
Compared with the prior art, the method has the following advantages:
1) the ventilation structure is compactly arranged, and the fan room is positioned underground, so that the ventilation function requirement of the tunnel can be realized, the floor occupation can be effectively saved, and the vegetation damage can be reduced;
2) the inclined shaft can be used as a construction auxiliary channel during construction, and is used for operation ventilation in the later period;
3) although the number of cross points and upper cross points of the underground air duct is large, the construction period can be shortened to the maximum extent by reasonably arranging the construction sequence on the premise of ensuring safety, so that the utilization rate of constructors, materials and machines is maximized;
4) the bottom of the upper-span section contact channel is in zero-distance three-dimensional intersection with the arch crown of the tunnel basically, the traditional concept of having certain arch crown soil covering thickness is broken through, and the ventilation efficiency is effectively improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a left side view of the first supply air connecting duct in fig. 1.
Fig. 3 is a left side view of the second supply air connecting duct in fig. 1.
Fig. 4 is a left side view of the first exhaust communication duct of fig. 1.
Fig. 5 is a left side view of the second exhaust communication duct of fig. 1.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and the detailed embodiments are given, but the scope of the present invention is not limited to the following embodiments.
As shown in figure 1, the ventilation system suitable for the ultra-long highway tunnel comprises a first tunnel 1 and a second tunnel 2 constructed by a full-section method, and further comprises an underground fan room 3 arranged close to the outer side of the second tunnel 2, wherein the underground fan room 3, the first tunnel 1 and the second tunnel 2 are arranged in the same direction, a first air blower 4, a second air exhauster 5, a first air exhauster 6 and a second air blower 7 are sequentially arranged in the underground fan room 3 from left to right, and an air supply inclined shaft 8 and an air exhaust inclined shaft 9 excavated downwards from the ground are arranged on the outer side of the underground fan room 3. The air supply inclined shaft 8 and the air exhaust inclined shaft 9 are single-hole tunnels, and the cross sections of the air supply inclined shaft and the air exhaust inclined shaft are of structures combining straight walls and semicircular arches.
The air supply inclined shaft 8 is communicated with a first air supply communicating air channel 10 and a second air supply communicating air channel 11 through an air supply branch opening, the first air supply communicating air channel 10 crosses the second tunnel 2 upwards after passing through the first air blower 4 and is communicated with a first air supply opening at the top of the first tunnel 1, and the second air supply communicating air channel 11 is communicated with a second air supply opening at the top of the second tunnel 2 through the second air blower 7; the inclined air exhaust shaft 9 is communicated with a first air exhaust communicating air duct 12 and a second air exhaust communicating air duct 13 through an air exhaust branch opening, the first air exhaust communicating air duct 12 crosses over the second tunnel 2 upwards after passing through the first air exhaust fan 6 and is communicated with a first air exhaust opening on the side surface of the first tunnel 1, and the second air exhaust communicating air duct 13 is communicated with a second air exhaust opening on the side surface of the second tunnel 2 through the second air exhaust fan 5; the first exhaust connecting air duct 12 and the second exhaust connecting air duct 13 are located between the first supply connecting air duct 10 and the second supply connecting air duct 11, and the second supply connecting air duct 11 is connected with the second blower 7 after crossing the exhaust inclined shaft 9.
The first air supply outlet is positioned in the upper space outside the building limit of the first tunnel 1 and extends 5-25 meters leftwards along the top of the first tunnel 1, and the wall thickness and the air supply area meet the requirement of the wind speed; the second air supply outlet is positioned in the upper space outside the building limit of the second tunnel 2 and extends to the right for 5-25 meters along the top of the second tunnel 2, and the wall thickness and the air supply area also meet the requirement of the wind speed; in order to reduce the wind resistance, the corners of the first air supply outlet and the second air supply outlet are provided with guide plates.
The first air outlet is perpendicular to the first tunnel 1, the second air outlet is perpendicular to the second tunnel 2, and the first air outlet and the second air outlet are of a structure combining a straight wall and a semicircular arch.
Because the left end of the underground fan room is provided with the duty room and the power distribution grotto, a transportation channel 14, a first evacuation channel 15 and a second evacuation channel 16 are also arranged between the underground fan room 3 and the second tunnel 2. The transport channel 14 is located on the left side of the first air supply connecting duct 10, the first evacuation channel 15 is located on the left side of the transport channel 14, and the second evacuation channel 16 is located on the right side of the second air supply connecting duct 11. The evacuation channel can be used for people to move between the tunnel and the fan room, and the transport channel can be used for transporting equipment such as a fan and the like.
The cross sections of the underground fan room 3, the first air supply connecting air duct 10, the second air supply connecting air duct 11, the first exhaust connecting air duct 12, the second exhaust connecting air duct 13, the transport channel 14, the first evacuation channel 15 and the second evacuation channel 16 are all straight-wall arched section structures.
Above-mentioned ventilation system sets up underground, through setting up more secret wind channel crosspoint and striding the structure on, reaches compact structure's purpose, during the construction, should comply with following principle:
when the connection air channel is used for crossing a road tunnel or other connection air channels, the construction sequence is that ① the road tunnel is firstly constructed and the lower connection air channel ② is constructed to cross the connection air channel, when the bottom of the connection air channel is tightly attached to the primary support construction, non-blasting excavation is adopted, and when the bottom of the connection air channel is closer to the primary support, blasting control and monitoring measurement are adopted.
When the connecting air channel crosses the road tunnel, the construction sequence is ① that firstly constructing the road tunnel ②, then constructing the air exhaust connecting channel ③ and then constructing the air supply connecting channel.
The construction sequence of each cross part is to implement the next cavern after the secondary lining construction of the cavern is completed to reach the design strength in advance, and control blasting is adopted to strengthen monitoring and measurement, so that the construction period is shortened to the maximum extent on the premise of ensuring safety, and the utilization rate of constructors, materials and machines is maximized. Specifically, the construction method is carried out according to the following modes:
constructing an air supply inclined shaft 8 and a first air supply connection air channel 10 connected with the air supply inclined shaft, wherein the first air supply connection air channel 10 is constructed to the intersection of the first tunnel 1 after crossing the second tunnel 2, and after the first tunnel 1 constructed by the full section method passes through the intersection for 20-30 m, a first air supply opening is constructed outwards from the top of the first tunnel 1, and then the first air supply opening is communicated with the first air supply connection channel 10, so that the construction of the first air supply connection channel 10 is completed; then, excavating construction of the left section of the underground fan room 3 is carried out by jacking the left side of the first air supply communication channel 10, and a transport channel 14 and a first evacuation channel 15 are sequentially constructed from the underground fan room 3 to the second tunnel 2;
when the air supply inclined shaft 8 is constructed, the air exhaust inclined shaft 9 and a first air exhaust connecting air duct 12 connected with the air exhaust inclined shaft are constructed, the excavation construction of the right section of the underground fan room 3 is carried out by right-hand jack-up from the first air exhaust connecting air duct 12 to the intersection of the underground fan room 3, then, the first air exhaust connecting air duct 12 excavates and communicates the right section of the underground fan room 3 and the left section of the underground fan room 3 left-hand, and the construction of the underground fan room 3 is completed; then, continuing to construct the first exhaust connecting air duct 12, after the first exhaust connecting air duct crosses the second tunnel 2, constructing to the intersection with the first tunnel 1, stopping temporarily, after the first tunnel 1 passes through the intersection, constructing a first exhaust opening of the first tunnel 1 at a set position, then communicating the first exhaust opening with the first exhaust connecting channel 12, and completing the construction of the first exhaust connecting channel 12;
after the construction of the underground fan room 3 is finished, a second air exhaust connecting air channel 13, a second air supply connecting channel 11 and a second evacuation channel 16 are respectively constructed from the underground fan room 3 to the direction of the second tunnel 2; for the second air exhaust connecting air duct 13, firstly, the second air exhaust connecting air duct is communicated with a second air exhaust port on the side surface of the second tunnel 2 by referring to the construction step of the first air exhaust connecting air duct 12, and then, the second air exhaust connecting air duct is constructed towards the direction of the air exhaust inclined shaft 9 by the underground fan room 3 and communicated with the air exhaust branch ports to complete the construction of the second air exhaust connecting channel 13; for the second air supply connection channel 13, firstly referring to the construction step of the first air supply connection channel 10, the second air supply connection channel is communicated with a second air supply outlet at the top of the second tunnel 2, then the second air supply connection channel is constructed towards the direction of the inclined exhaust shaft 9 by the underground fan room 3, and when the second air supply connection channel 11 crosses over the inclined exhaust shaft 9, the second air supply connection channel extends to the inclined air supply shaft 8 and is communicated with an air supply branch port, so that the construction of the second air supply connection channel 11 is completed; for the second evacuation passageway 16, the construction of the second evacuation passageway 16 is completed after the second evacuation passageway is communicated with the second tunnel 2.
In the description of the present invention, it should be noted that the terms "left", "right", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (7)
1. A construction method of a ventilation system suitable for an ultra-long highway tunnel is characterized by comprising the following steps:
the ventilation system comprises a first tunnel, a second tunnel and an underground fan room which is arranged close to the outer side of the second tunnel, the underground fan room, the first tunnel and the second tunnel are arranged in the same direction, a first air feeder, a second air exhauster, a first air exhauster and a second air feeder are sequentially arranged in the underground fan room from left to right, and an air supply inclined shaft and an air exhaust inclined shaft which are excavated downwards from the ground are arranged on the outer side of the underground fan room; the air supply inclined shaft is communicated with a first air supply communicating air channel and a second air supply communicating air channel through an air supply branch port, the first air supply communicating air channel crosses over a second tunnel upwards after passing through a first air feeder and is communicated with a first air supply port at the top of the first tunnel, and the second air supply communicating air channel is communicated with a second air supply port at the top of the second tunnel through a second air feeder; the air exhaust inclined shaft is communicated with a first air exhaust communicating air duct and a second air exhaust communicating air duct through air exhaust branch openings, the first air exhaust communicating air duct crosses over a second tunnel after passing through a first exhaust fan and is communicated with a first air exhaust opening on the side surface of the first tunnel, and the second air exhaust communicating air duct is communicated with a second air exhaust opening on the side surface of the second tunnel through a second exhaust fan; the first air exhaust connecting air duct and the second air exhaust connecting air duct are positioned between the first air supply connecting air duct and the second air supply connecting air duct, and the second air supply connecting air duct is connected with the second air feeder after crossing the air exhaust inclined shaft; a transport channel, a first evacuation channel and a second evacuation channel are also arranged between the underground fan room and the second tunnel;
the construction method comprises the following steps:
constructing an air supply inclined shaft and a first air supply connection air channel connected with the air supply inclined shaft, wherein the first air supply connection air channel is constructed to the position of a first tunnel intersection after crossing from the upper part of a second tunnel, and after the first tunnel constructed by a full cross-section method passes through the intersection for 20-30 meters, a first air supply opening is constructed outwards from the top of the first tunnel, and then the first air supply opening and the first air supply connection channel are communicated to finish the construction of the first air supply connection channel; then, excavating construction of the left section of the underground fan room is carried out towards the left top by the first air supply connection channel, and a transport channel and a first evacuation channel are sequentially constructed from the underground fan room to the second tunnel;
when the air supply inclined shaft is constructed, the air exhaust inclined shaft and a first air exhaust connecting air channel connected with the air exhaust inclined shaft are constructed, the air exhaust inclined shaft and the first air exhaust connecting air channel reach an intersection of the first air exhaust connecting air channel and the underground fan room, the right top of the air exhaust connecting air channel is lifted rightwards to carry out excavation construction on the right section of the underground fan room, then the first air exhaust connecting air channel is excavated leftwards to connect the right section of the underground fan room and the left section of the underground fan room, and construction of the underground fan room; then, continuously constructing a first exhaust connection air channel, constructing to an intersection with the first tunnel after the first exhaust connection air channel crosses the second tunnel, temporarily stopping, constructing a first exhaust opening of the first tunnel at a set position after the first tunnel passes through the intersection, and then communicating the first exhaust opening with the first exhaust connection channel to finish the construction of the first exhaust connection channel;
after the construction of the underground fan room is finished, a second air exhaust connecting air channel, a second air supply connecting channel and a second evacuation channel are respectively constructed from the underground fan room to the direction of a second tunnel; for the second air exhaust connection air duct, the second air exhaust connection air duct is firstly communicated with a second air exhaust port on the side surface of the second tunnel, and then is constructed towards the direction of an air exhaust inclined shaft by an underground fan room and is communicated with an air exhaust branch port, so that the construction of a second air exhaust connection channel is completed; for the second air supply communication channel, firstly, the second air supply communication channel is communicated with a second air supply outlet at the top of the second tunnel, then, the second air supply communication channel is constructed in the direction of the inclined exhaust shaft by the underground fan room, and when the second air supply communication channel crosses the upper part of the inclined exhaust shaft, the second air supply communication channel extends to the inclined air supply shaft and is communicated with the air supply branch port, so that the construction of the second air supply communication channel is completed; and for the second evacuation channel, the construction of the second evacuation channel is completed after the second evacuation channel is communicated with the second tunnel.
2. The construction method of a ventilation system for an ultra-long road tunnel according to claim 1, wherein: the cross sections of the underground fan room, the first air supply connecting air duct, the second air supply connecting air duct, the first exhaust connecting air duct, the second exhaust connecting air duct, the transport channel and the evacuation channel are all straight-wall arched section structures.
3. The construction method of a ventilation system for an ultra-long road tunnel according to claim 1, wherein: the air supply inclined shaft and the air exhaust inclined shaft are single-hole tunnels, and the cross sections of the air supply inclined shaft and the air exhaust inclined shaft are of structures combining straight walls and semicircular arches.
4. The construction method of a ventilation system for an ultra-long road tunnel according to claim 1, wherein: the first air outlet is vertical to the first tunnel, the second air outlet is vertical to the second tunnel, and the first air outlet and the second air outlet are of a structure combining a straight wall and a semicircular arch.
5. The construction method of a ventilation system for an ultra-long road tunnel according to claim 1, wherein: the first air supply outlet extends 5-25 meters leftwards along the top of the first tunnel, the second air supply outlet extends 5-25 meters rightwards along the top of the second tunnel, and guide plates are arranged at corners of the first air supply outlet and the second air supply outlet.
6. The construction method of a ventilation system for an ultra-long road tunnel according to claim 1, wherein: the transport channel is positioned on the left side of the first air supply communication air channel, the evacuation channel comprises a first evacuation channel and a second evacuation channel, the first evacuation channel is positioned on the left side of the transport channel, and the second evacuation channel is positioned on the right side of the second air supply communication air channel.
7. The construction method of a ventilation system for an ultra-long road tunnel according to claim 1, wherein: the end part of the underground fan room is provided with a duty room and a power distribution grotto.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127934A (en) * | 2020-09-10 | 2020-12-25 | 北京科技大学 | Variable-frequency energy-saving ventilation system and method for high-altitude high-temperature extra-long tunnel construction |
| CN113323722A (en) * | 2021-06-23 | 2021-08-31 | 中建七局第一建筑有限公司 | Water burst treatment method for extra-long tunnel |
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